The complex of dimethylglyoxime (DMG) with Ni ion has the formula Ni(DMG)2. So there exists 1 molecule of Ni per molecule of the complex. The molar mass of the complex is 288.917g/mol.
Given that 175 mg is the maximum convenient quantity that can be handled, the moles of the complex in it is 175/288.917 = 0.6057 mmol (1 mmol = 0.001 mol)
So, the moles of Ni in that will also be 0.6057 mmol. This amounts to (0.6057 mmol)*(58.6934 g/mol) = 35.5505 mg.
Given that 24% of the alloy is Ni, the sample taken should be such that 24% of it is 35.5505 mg, since alloys are homogenous solid solutions and the concentration of Ni will be equal throughout the sample. This amounts to 35.5505/0.24 = 148.1271 mg of the sample.
So, a sample size of 148.1271 mg of alloy should not be exceeded to ensure that the resultant DMG complex does not exceed the limit.
The addition of dimethylglioxime, H2C & H & O2N2, to a solution containing the nickel ion (I) results in a preci...
The addition of dimethylglycoxime, H2C4H6O2N2, to a solution containing nickel(II) ion gives rise to a precipitate: Ni2+ + 2H2C4H6O2N2 Ni(H2C4H6O2N2)2 + 2H+ If 0.15 g nickel alloy is treated with dimethylglycoxime and .175 mg nickel dimethylglycoxime is collected. Determine the mass and percent of nickel in the alloy.
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...